The original KatKoyn, running it's own blockchain since 3 January 2014. There are no tokens here.
This coin was previously known as Nyancoin, and has used certain rainbow related artwork since it's inception 9 years ago.
In January 2023, the owner of that artwork requested that it be removed, and this request has been complied with.
Nyancoin is now known as KatKoyn. The blockchain is unchanged, as are all previous transactions, addresses, wallets and network operations.
Websites and artwork are currently being updated, so things may not appear exactly as their final versions for some time. External websites will still refer to Nyancoin until they are updated by whoever maintains them.
New Telegram group: t.me/katkoyn
New Reddit: r/KatKoyn/
In summary, this is just a change of name and appearance. Nothing has been lost, everything from the last 9 years is still valid.
New exchange TXBIT: txbit.io
All of the usual warnings here still apply.